End-to-end encryption concept in HLD - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to identify the key used only by sender and receiver.

HLD

The message is encrypted using the [1] key before sending.

Drag options to blanks, or click blank then click option'

Ashared

Bprivate

Csession

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing public key with shared key

Using private key for encryption in this context

The shared key is known only to sender and receiver, ensuring confidentiality.

2fill in blank

medium

Complete the code to specify the encryption method that ensures only sender and receiver can read the message.

HLD

End-to-end encryption uses [1] encryption to secure messages.

Drag options to blanks, or click blank then click option'

Aasymmetric

Bsymmetric

Chashing

Dtoken-based

Attempts:

3 left

💡 Hint

Common Mistakes

Choosing asymmetric encryption which uses different keys

Confusing hashing with encryption

Symmetric encryption uses the same key for encryption and decryption, suitable for end-to-end encryption.

3fill in blank

hard

Fix the error in the statement about who can decrypt the message.

HLD

Only the [1] can decrypt the message in end-to-end encryption.

Drag options to blanks, or click blank then click option'

Anetwork

Bserver

Csender and receiver

Dthird-party

Attempts:

3 left

💡 Hint

Common Mistakes

Assuming server can decrypt

Thinking third-party can access message content

In end-to-end encryption, only the sender and receiver have the keys to decrypt the message.

4fill in blank

hard

Fill both blanks to complete the description of the encryption process.

HLD

The sender uses the [1] key to encrypt the message, and the receiver uses the [2] key to decrypt it.

Drag options to blanks, or click blank then click option'

Ashared

Bpublic

Cprivate

Dsession

Attempts:

3 left

💡 Hint

Common Mistakes

Using public and private keys which belong to asymmetric encryption

Mixing session key with shared key

Both sender and receiver use the same shared key to encrypt and decrypt messages in end-to-end encryption.

5fill in blank

hard

Fill all three blanks to complete the explanation of key exchange and encryption.

HLD

The [1] key is exchanged securely using [2] encryption, then used for [3] encryption of messages.

Drag options to blanks, or click blank then click option'

Asession

Basymmetric

Csymmetric

Dpublic

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing the types of encryption used for key exchange and message encryption

Using public key directly for message encryption

The session key is exchanged securely using asymmetric encryption, then used for symmetric encryption of messages for efficiency and security.